Its 'optimism index' - which sources UK business surveys - reached a four-year high in October, suggesting buoyant growth next year. BDO partner Peter Hemington warned 'inflation could go above the two% annual target in 2005', triggering higher rates. The report comes after last week's interest rate rise by China, widely seen as a first step towards freeing its currency, the renminbi, from its fixed rate against the dollar. This rate has been kept artificially low by the Chinese, keeping down the price of the country's exports.